Improvement in telegraph-insulators



J. W. FRY. TELEGRAPH INSULATORE Patented July 6; 1869.

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JOHN W. FRY, OF ELIZABETH, NEW JERSEY.

Letters Patent N 0. 92,299, dated July 6, 1869.

IMPROVEMENT IN TBLE GRAPH-INSULATORS.

The Schedule referred to in these Letters Patent and making part of thelame.

To all whom it may concern Be it known that I, J on W. Fm, of Elizabeth,in the count-yoi' Essex, and State of New Jersey, have invented acertain new and improved Insulator t'or Telegraph-Wires; and I do herebydeclare that the following is a full and exact description thereot',refer- Like lettersot reference indicate correspondingparts in all thefigures.

The nature of my invention consists in an insulator for attachingtelegraph-wires, which holds the wire by compression in an elastic and:non-conducting sub stance, wherchy'it is firmly held, but in a mannerwhich allows it to render as required, and prevents it from bing brokenby chafing, as when against, a rigid ruetallic bearing, under thevibration to which it is subjected, and renders insulation more perfect.

An ordinary cast-iron spindle, A, is formed with a head, consisting of afixed jaw, b, and a movable one, 0, connected therewith by lugs, orhinges, or other joint. that will enable it to be opened, to receive thewire, and securely locked, to retain it.

I prefer tocastthe loose jaw with projections, which will form a hingedconnection, whereby it-opens t'orthe purpose required, and, when closed,be secured by the pin 1:, fig. 1, which is readily formed oi a bit oftt'lfi-w These jaws receive a block of India rubber, f, preferably ofcylindrical shape, and of a size largerthan the space in which it, islrcld,so that itis tbrciblycornprcssed when they are closed andfastened.

A radial incision, extending from the surface to the centre, receivesthe telegraph-wire d, which lies, as shown in the drawings, centrallyembedded in the surro .olllg rubber. It; is held thercinby compression,with sutficient firmness, but with agrasp which yields, and allows it torender \vhcutension is applied.

The wire may be as rapidly strung with this insulator as with any other.It is held, as it were, in a cushioned .visc, which yields sutlicicntlyto the flexion prmluced by wind and other causes, to prevent; itsbreaking or chafing, as when itis supp rted in contact. with ametal hookor other firstening. It is held by such close adhesion that no water canpenetrate, and, by freezing, destroy insulation.

' The spindle may be inserted in the socket G, ordinarily used, orconnected directly to the'arru ot' the telegraph-post.

The use of this insulator insures greater durability,

by rendering the breakage of the wire' less frequent, and a betterworking of the line, by its more perfect insulation, while the cost; isnot. enhanced.

\Vhat I claim, and desire to secure by Letters Patent, is-

1. An insulator for telegraph-wires, formed to hold the. wire by thecompression oi'a surrounding cushion of India rubber, or othernon-conducting and elastic substance, substantially as set; forth.

2. An insulator, consisting of the spindle A, jaws b o, and India rubberf, arranged and operating substantially as and for the purpose setforth. 7

In. witness whereof, I have hereunto signed my name, in the presence oftwo subscribing witnesses.

' JOHN W. FRY.

Witnesses:

J. Fnasnn, I. A Dsvrs.

